1331031213173 has 2 divisors, whose sum is σ = 1331031213174. Its totient is φ = 1331031213172.

The previous prime is 1331031213067. The next prime is 1331031213179. The reversal of 1331031213173 is 3713121301331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 795524854084 + 535506359089 = 891922^2 + 731783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331031213173 - 2²² = 1331027018869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331031213179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665515606586 + 665515606587.

It is an arithmetic number, because the mean of its divisors is an integer number (665515606587).

Almost surely, 2^{1331031213173} is an apocalyptic number.

It is an amenable number.

1331031213173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331031213173 is an equidigital number, since it uses as much as digits as its factorization.

1331031213173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 29.

The spelling of 1331031213173 in words is "one trillion, three hundred thirty-one billion, thirty-one million, two hundred thirteen thousand, one hundred seventy-three".